Hello, Puzzled by data from "mediainfo".
Setup1: VCR->Diamond VC500->PC via USB; Using Vdub Device=Conexant Polaris Video Capture (Direct Show) Video=preview Video Source=Video Composite Capture Pin=NTSC_M FR=29.970; Color Space=UYVY; Output Size=720x480 Compression=Huffyuv v2.1.1 Set Custom Format=720x480 UYVY YUV4:2:2 interleaved I don't understand why the "Display aspect ratio" = 3:2 Looking at with VLC, MVP fullscreen it looks/measures 3:2. Code:
General Burt -- merged -- EDIT: I just realized 720/480 = 1.5 = 3:2 so DUH! But why is SETUP2 at 4:3 at 720/480 pixels? Or has Pixel Aspect ratio changed? What are the optimum settings for SETUP1 ? Again many thanks. END EDIT: |
AVI has no AR flags.
These are not meant for watching, but archive and working/intermediary files. |
AVI only supports the storage of display aspect ratio (DAR) metadata if the first 4 bytes of the file spell "AVIX" in ASCII, meaning it makes use of OpenDML extensions. Otherwise the 4th character is a space instead of an X, and DAR metadata is not supported.
Software varies widely in its support of reading and writing AVI with OpenDML extensions. Some will write ordinary AVI files, some will write the OpenDML-supporting files. Some will put the DAR info in, some won't. Some will read the DAR info, some will ignore it. If you want to try to watch your AVIs with the correct DAR, or just want to have the correct DAR stored in them for later use (e.g to avoid having to specify it when transcoding), you can use FFmpeg to remux them into new AVIs with the OpenDML headers and DAR info added: ffmpeg -i input.avi -c copy -aspect 4/3 output.avi |
Site design, images and content © 2002-2024 The Digital FAQ, www.digitalFAQ.com
Forum Software by vBulletin · Copyright © 2024 Jelsoft Enterprises Ltd.